lsp.h

来自「KphoneSI (kpsi) is a SIP (Session Initia」· C头文件 代码 · 共 58 行

/*---------------------------------------------------------------------------*\
Original Copyright
	FILE........: AK2LSPD.H
	TYPE........: Turbo C header file
	COMPANY.....: Voicetronix
	AUTHOR......: James Whitehall
	DATE CREATED: 21/11/95

Modified by Jean-Marc Valin

    This file contains functions for converting Linear Prediction
    Coefficients (LPC) to Line Spectral Pair (LSP) and back. Note that the
    LSP coefficients are not in radians format but in the x domain of the
    unit circle.

\*---------------------------------------------------------------------------*/
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*/

#ifndef __AK2LSPD__
#define __AK2LSPD__

int lpc_to_lsp (float *a, int lpcrdr, float *freq, int nb, float delta, char *stack);
void lsp_to_lpc(float *freq, float *ak, int lpcrdr, char *stack);

/*Added by JMV*/
void lsp_enforce_margin(float *lsp, int len, float margin);


#endif	/* __AK2LSPD__ */